/Engine/Source/Runtime/SkeletalMeshDescription/Public/SkeletalMeshOperations.h
static void AppendSkinWeight ( const [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & SourceMesh, [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & TargetMesh, [FSkeletalMeshAppendSettings](API\Runtime\SkeletalMeshDescription\FSkeletalMeshOperations\FSkeletalMeshApp-) & AppendSettings )